ML20031D177
| ML20031D177 | |
| Person / Time | |
|---|---|
| Site: | McGuire  |
| Issue date: | 09/21/1981 |
| From: | Parker W DUKE POWER CO. |
| To: | Adensam E, Harold Denton Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20031D173 | List: |
| References | |
| NUDOCS 8110130034 | |
| Download: ML20031D177 (2) | |
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Of fice of Muclear Reactor Regulation U. S. Nuclear Regulatory Commission 4 1
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Roi NcCuire Nvelcar Station h6 IS Q("
Proposed Amendment to Licenne NTF-9 e
Docket No. 50-369 0
Dear hir. Denion:
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Attacised is a pro' posed change 'to the IfcCuire Nucicar Statdon, Unit 5 Techni-
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6 cal Specifications., This change corrects i;he cetpoint ascocInted with the reactor trip iu5tiated by a turbino trip.
'Dric ahnnge has been revleucd and kk has ocen etermined that khece are no adver.ne cafety or environmental impacts associated with the proposed change, The prop 6seFehange is conaldered to,be a Class,III. amendment pursuant to
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Therefore, encioned is n chech in the amount of $4000.
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alHillints 0. Path <er;.$r.
"Villinta. O. Parker, Jr.
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. Craham hr. Janes i', O'Reiiiy. Director ect Resident Inspector,
U. S. Nucira-Reguintory Cominsfon
}!cCuireNucleneStat1on Region H
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101 }farletra Street, Suii;e 3100
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T'echnical Specification 2.2
'Icactor Trip Instrumentation Getpoints Proposed Change e
Changa yalues on Iten 1.2B in Table 2.1-1 to read}
12A}LowSystemPrecourcTrip-TripSetpointt43poig I
AllowableValue142psig Juutification and Safo::y Analysis The design of the Turbino Trip / Reactor Trip circuit is bar cd on the control oil systen which is used to control Deli systta' oil pressure through an interface valve.
When a' turbine trip signal is initiated', a soction of the control oil system is bled off which in turn dumps the pressure on the DElt system to close the turbine control and stop valves.
This control oil system generates a low preasure algnal. at 45 psig through 2 out of 3 logic to trip the reactor above the P-8 octpoint.
The Dell lou pressure trip 'nt 900 peig serves to close tha turbine control and stop valvoo which in turn would trip the reactor througly -.'
the turbine stop valve closure suitch at II open.
However, the DEH system how * -
pecosuro trip does not directly feed the reactor trip circuit.
Therciore, h.he c
sotpoint specified should be for the control oil prosauro switches ultich fdir--
ectly loitiato the reactor trip.
This proposed change corrects the current Technical Spacifications to correctly specify the trip sotpoint. and as such does not result in any adverso safety in-p11ca t ions.
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